.warrper{
    width: 800px;
    height: 800px;
    background-color: darkorange;
}
.line_landscape{
    position: relative;
    width: 800px;
    border: solid black 1px;
    margin-top: 50px;
}
.line_vertical{
    position: relative;
    float: left;
    height: 800px;
    border: solid black 1px;
    margin-left: 48px;
}
.chess{
    position: absolute;
    width: 20px;
    height: 20px;
    background-color: black;
    border: black solid;
    border-radius: 999px;

}
